Improved boot-crimper screw



diritti i Lette-rs Patent No. 97,286, dated Zirovmnber 30, 1869` I'MPRovED Boor-CRIMPER' SCREW.

The Schedule referred to in these Letters Patent and making part/of the same.

To all whom fit may concern:

Be it known that I7 JACOB EDsoN, of 132 Gomlnercial Street, Boston, in the county of' Suffolk, in the State of Massachusetts, have invented a new and usefnl Improvement on a Boot-Orimper Screw; and I do hereby declare that the Ifollowing isia full and exact description thereof, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, in which- Figure A is a cross-section over :r

Figure B is a Section over y y.

Figure C is a ground-plan or 'top view.

Figure I) shows haltl the inside ofthe jaw, and

Figure E shows half the outside or grooved side of the jaw.

Figure F is an end View of said jaw.

a is the screw, worked by manual power, bymeans of a handle on itsl lower end, working into the foursided nut b.

c c are the jaws, which, on their inner sides, have a perpendicular groove, so as' to give room for the screw a to pass readily, without friction, between the jaws, when these are brought together.

d is the clasp, for receiving the jaws c c.

This clasp has two circular apertures, opposite each other, c c, to `receive suitable springs, which, by their action ou the jaws, keep the same open, so as to admit easy the material to be held.

The upper end of jaws c c, and lower end of nut b, have rounded corners, so as to easily allow of the en-4 trance ofthe uut between the jaws, in whatever position the nut may be, thereby seeming speed in the commencement, and power in the progress' of doing the work.

The clasp dy has on its lower part a round chamber, f, extending downward, so as to admit freely of-the passing through of the screw a, and also receiving the lower end ofthe jaws c c, which encircle in afi-ee and easy manner the screw a.

D shows half ofthe inner side of the jaw, with the going right through, as in Mowrcys case.

which prevent their slipping out of the clasp, and al lows them to operate easily in their natural position.v

The relative position of the springs c e gives the leverage required for the perfect 'adjustment of the said jaws, and bring it within the perfect control of' the operator, by means ot' the handl:x on the lower part ot' screw a.

I am aware that a patent was grantcih, under No. 66,035, to Mr. Dewitt G. Mowrey, on June 25, 1867,' for a boot-crimper screw, but I do not use, as he does, slot holes, going right through the bottonr of the clasp 1l, for receiving the jaws, but I use a chamber, f, with an opening upward, this. said chamber not I secure hereby increased strength and freedom from dust and dirtto enter into the clasp.

I do not use, as Mowrey does, a flat T-headed lower part of jaws c, but I use a semicircnlar vbottleneckshaped lower part, as shown in F, for said jaws to pass easily' into the chamber f, as described,

Having thus described my invention,

' I claim, the combination oi" the screw a, nut b, orimpers c, having a number of square cavities on their outside, with the points lo k, inside the India-rubber springs c e, all combined and acting together with the house (I, fully set forth and described.

. JACOB EDSON.

f Witnesses: a

ALBAN ANDRN, BELIZE. 

